Journal
IEEE WIRELESS COMMUNICATIONS LETTERS
Volume 8, Issue 4, Pages 1124-1128Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2019.2908829
Keywords
SWIPT; lens-antenna array; massive MIMO; mmMave; multicast; unicast
Categories
Funding
- European Commission through 5GPPP Project 5GX-Cast (H2020-ICT-2016-2 call) [761498]
- U. K. Engineering and Physical Sciences Research Council [EP/P008402/1]
- National Natural Science Foundation of China [61801434]
- China Post-Doctoral Science Foundation [2018M642784]
- Scientific and Technological Key Project of Henan Province [192102310178]
- EPSRC [EP/P008402/2, EP/P008402/1] Funding Source: UKRI
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In this letter, we study the beamforming design in a lens-antenna array-based joint multicast-unicast millimeter wave massive MIMO system, where the simultaneous wireless information and power transfer at users is considered. First, we develop a beam selection scheme based on the structure of the lens-antenna array and then, the zero forcing precoding is adopted to cancel the inter-unicast interference among users. Next, we formulate a sum rate maximization problem by jointly optimizing the unicast power, multicast beamforming, and power splitting ratio. Meanwhile, the maximum transmit power constraint for the base station and the minimum harvested energy for each user are imposed. By employing the successive convex approximation technique, we transform the original optimization problem into a convex one, and propose an iterative algorithm to solve it. Finally, simulation results are conducted to verify the effectiveness of the proposed schemes.
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